So the 9 lamp adjustable angle fitting arrived. Screwed in 8 lamps. Gave each about 30 degee's of tilt. That put maybe 1cm between each lamp. Hung at 30cm and saw a nice even 40,000 Lux over the 0.25m I hoped to cover. Instant result really.
The 40k is dependent on multiple fittings, as intended. I saw 40k under the lamp, 20k at the edge of my space, and 0.3k under the next fitting. All within 15%, which equated to a little much in the middle, and a little less at the edges, but I didn't try to adjust the lamps as I know it's just fine tuning.
So that's 480w of household led, split between 4 pods, mounted at 30cm. Giving 40k over a meter. Using one of them orange cased meters. Which measures my veg area at 10k and doing fine. So 40k must be something...
This presumes a light every 50cm. At the periphery this won't happen. I reckon 30k over a single meter is likely.
I have no idea how this relates to grows in the comparison thread, which seems to of gone way off topic now, and stepped back in time to lighting measured in watts.
I didn't fit the central lamp, As I'm drilling out the middle of the fitting for air cooling. This thing looks a bit like an 8 legged tripod with the lamps in. I'm going to take that tripod, and make it a teepee. Skirting round the lamp holders (with gaffer, obviously)